无模板溶液燃烧法合成的大/中孔 NiCoO 以增强非酶安培葡萄糖传感器的性能。

Macro-/meso-porous NiCoO synthesized by template-free solution combustion to enhance the performance of a nonenzymatic amperometric glucose sensor.

机构信息

School of Materials Science and Engineering, Yunnan University, 650091, Kunming, People's Republic of China.

Key Lab of Quantum Information of Yunnan Province, Yunnan University, 650091, Kunming, People's Republic of China.

出版信息

Mikrochim Acta. 2019 Dec 18;187(1):64. doi: 10.1007/s00604-019-4063-8.

DOI:10.1007/s00604-019-4063-8

PMID:31853725

Abstract

A sensitive nonenzymatic amperometric glucose sensor is described that relies on a glassy carbon electrode modified with a macro-/meso-porous NiCoO. NiCoO with spinel structure has been prepared via a one-step solution combustion method. The material was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen absorption/desorption. An electrode was coated with the porous material and then displayed excellent electrocatalytic activity towards the direct oxidation of glucose in 0.15 M NaOH solution by cyclic voltammetry. Amperometric I-t curve demonstrated a sensitivity of 2100 μA·mM·cm at an applied potential of 0.45 V (vs Hg/HgCl). The sensor has a linear response in the 0.001 to 1.0 mΜ glucose concentration range, a fast response time (3.9 s) and a low detection limit (0.38 μΜ). Graphical abstract.

摘要

一种灵敏的无酶安培葡萄糖传感器，依赖于玻碳电极修饰的大/中孔 NiCoO。采用一步溶液燃烧法制备具有尖晶石结构的 NiCoO。通过 X 射线衍射、扫描电子显微镜、透射电子显微镜和氮吸收/解吸对材料进行了表征。多孔材料涂覆在电极上，然后通过循环伏安法显示出对 0.15 M NaOH 溶液中葡萄糖的直接氧化具有优异的电催化活性。安培 I-t 曲线在 0.45 V（相对于 Hg/HgCl）的施加电位下表现出 2100 μA·mM·cm 的灵敏度。传感器在 0.001 至 1.0 mM 葡萄糖浓度范围内具有线性响应，响应时间快（3.9 s），检测限低（0.38 μM）。